var Sound={
    num:0,
    is_mute:false,
    loading:function(name,src,speend){
        var node=document.createElement("AUDIO");
        node.setAttribute('id',"sound_"+name);
        node.setAttribute('src',src);
        document.body.appendChild(node);
        eval('this.'+name+'=document.getElementById("sound_'+name+'")');
        eval('this.'+name+'.playbackRate='+speend);
        this.num++;
    },
    play:function(name){
        eval('this.'+name+'.currentTime=0');
        eval('this.'+name+'.play()');
    },
    //静音
    automute:function(){
        this.is_mute=!this.is_mute;
        for(var x in this){
            this[x].muted=this.is_mute;
        }
    }
}